Error compiling java code with MinGW gcj

Question

Hey,firends,This is my first post.

I'm just begin to using Gcc to compile java,and I have some trouble in doing this.

My input and output:

import java.io.*;
import java.util.*;

public class Program{
    public static void main (String args[]) throws Exception    {
        BufferedReader stdin =new BufferedReader(new InputStreamReader(System.in));
        String line = stdin.readLine();
        StringTokenizer st = new StringTokenizer(line);
        int a = Integer.parseInt(st.nextToken());
        int b = Integer.parseInt(st.nextToken());
        System.out.println(a+b);
    }
}

cmd:gcj Porgram.java

<2>output:

E:/mingw/bin/../lib/gcc/mingw32/3.4.5/../../../libmingw32.a:main.c:<.text+0xd2>:undefined reference to '_WinMain@16' collect2: ld returned 1 exit status

Any help would be very much appreciated!!

Ouch. Your formatting got destroyed there. Indent all of your code by four spaces (just select it all and press the 'code' formatting button) — goffrie, Jul 19 '10 at 03:56

score 2 · Accepted Answer · answered Jul 19 '10 at 04:49

2

Gcj neds to be told which of the classes it is compiling contains the main method. You can do this by using the --main command line parameter:

gcj --main=Program Program.java

answered Jul 19 '10 at 04:49

Jörn Horstmann

33,639
11
75
118

score 0 · Answer 2 · answered Jul 19 '10 at 04:57

0

You need to tell gcj the name of the class with the main method:

gcj --main=Program Program.java

answered Jul 19 '10 at 04:57

Hendrik Brummermann

8,242
3
31
55

Error compiling java code with MinGW gcj

2 Answers2